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United States Patent | 5,249,958 |
Freber | October 5, 1993 |
The burner construction having a bottom pan and a cover is divided into two sections which are independently active when a gas fuel is supplied by independent venturi tubes. The tubes and bottom pans are formed with cam-locking elements which require a twisting motion in the receiving apertures in which the twisting of the tubes engages the cam-locking elements which pulls a shoulder on the tubes into a tight sealing contact against the pan thereby avoiding the need for tools or the use of gasket materials to form the seal.
Inventors: | Freber; Donald E. (Glendale, MO) |
Assignee: | Marquette Tool & Die Company (St. Louis, MO) |
Appl. No.: | 977078 |
Filed: | November 16, 1992 |
Current U.S. Class: | 431/354; 126/39R; 126/41R; 239/600; 285/402; 431/278 |
Intern'l Class: | F23D 014/62 |
Field of Search: | 431/350,354,266,278,343,355 126/41 R,39 R,39 C,39 H 239/553.5,553,600 285/396,401,402 |
3619099 | Nov., 1971 | Moss et al. | 431/192. |
3638635 | Feb., 1972 | Drennan | 126/41. |
4055132 | Oct., 1977 | Stohrer, Jr. et al. | 113/116. |
4092975 | Jun., 1978 | Grammatopoulos | 126/41. |
4305372 | Dec., 1981 | Hahn | 126/41. |
4485972 | Dec., 1984 | Freber | 239/553. |
4773384 | Sep., 1988 | Koziol | 126/41. |
4986254 | Jan., 1991 | Haen et al. | 126/41. |
4989579 | Feb., 1991 | Murphy et al. | 126/41. |
5052920 | Oct., 1991 | Warren | 431/354. |
5186158 | Feb., 1993 | Ferlin | 431/354. |